<id/> tag will define colum "PERSONID" as the primary key for the object Person. It is not required in hibenate that PERSONID colum is a primary key to be declared as a primary key for the object.
Generator = increment means hibernate will treat this column like an AUTO GENERATED or SEQUENCE. When you save a Person object you dont have to pass a value for PERSONID. Hibernate will generate i for you.

I have a 2d matrix with dimension (3, n) called A, I want to calculate the normalization and cross product of two arrays (b,z) (see the code please) for each column (for the first column, then the second one and so on).
the function that I created to find the ...

Write a C program that should create a 10 element array of random integers (0 to 9). The program should total all of the numbers in the odd positions of the array and compare them with the total of the numbers in the even positions of the array and indicate ...